期刊
SKELETAL MUSCLE
卷 3, 期 -, 页码 -出版社
BMC
DOI: 10.1186/2044-5040-3-8
关键词
Transcription factor; Overexpressed; MyoD; c-Myc; ChIP-seq
类别
资金
- NIH NIAMS [R01AR045113]
- University of Washington Child Health Research Center, NIH [U5K12HD043376-08]
- Interdisciplinary Training Program grant [T32 CA080416]
- NATIONAL CANCER INSTITUTE [K08CA169014] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF ARTHRITIS AND MUSCULOSKELETAL AND SKIN DISEASES [R01AR045113] Funding Source: NIH RePORTER
Background: Transcription factor overexpression is common in biological experiments and transcription factor amplification is associated with many cancers, yet few studies have directly compared the DNA-binding profiles of endogenous versus overexpressed transcription factors. Methods: We analyzed MyoD ChIP-seq data from C2C12 mouse myotubes, primary mouse myotubes, and mouse fibroblasts differentiated into muscle cells by overexpression of MyoD and compared the genome-wide binding profiles and binding site characteristics of endogenous and overexpressed MyoD. Results: Overexpressed MyoD bound to the same sites occupied by endogenous MyoD and possessed the same E-box sequence preference and co-factor site enrichments, and did not bind to new sites with distinct characteristics. Conclusions: Our data demonstrate a robust fidelity of transcription factor binding sites over a range of expression levels and that increased amounts of transcription factor increase the binding at physiologically bound sites.
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